Back to your original question about Tretter, apparently he had reps at LT yesterday.
Per the GBPG:
• Tretter, who primarily plays center and occasionally works at guard, took a few snaps at left tackle with the backup offense. That suggests he might get a few snaps there Thursday against New Orleans as preparation for emergency duty.
http://www.packersnews.com/story/spo...hart/71519134/